diff --git a/configs/debug/debug.toml b/configs/debug/debug.toml
index a9bcea26..69757b76 100644
--- a/configs/debug/debug.toml
+++ b/configs/debug/debug.toml
@@ -12,5 +12,5 @@ warmup_steps = 10
 total_steps = 10
 
 [data]
-fake_data = true
+fake = true
 
diff --git a/configs/debug/diloco.toml b/configs/debug/diloco.toml
index 16805f14..fe2b459d 100644
--- a/configs/debug/diloco.toml
+++ b/configs/debug/diloco.toml
@@ -12,7 +12,7 @@ warmup_steps = 10
 total_steps = 10
 
 [data]
-fake_data = true
+fake = true
 
 [diloco]
 inner_steps = 5
diff --git a/src/zeroband/train.py b/src/zeroband/train.py
index 552549cf..bad4f6b7 100644
--- a/src/zeroband/train.py
+++ b/src/zeroband/train.py
@@ -39,7 +39,7 @@ def ddp_setup():
 
 class DataConfig(BaseConfig):
     seq_length: int = 1024
-    fake_data: bool = False
+    fake: bool = False
     num_workers: int = 4
 
 
@@ -97,7 +97,7 @@ def train(config: Config):
         seq_length=config.data.seq_length,
         batch_size=config.train.micro_bs,
         num_workers=config.data.num_workers,
-        fake_data=config.data.fake_data,
+        fake_data=config.data.fake,
     )
 
     model, model_config = get_model(